Pacing of the latest Ordovician and Silurian carbon cycle by a 4.5 Myr orbital cycle Sproson, Adam D. Abstract Publication: Palaeogeography Palaeoclimatology Palaeoecology Pub Date: February 2020 DOI: 10.1016/j.palaeo.2019.109543 Bibcode: 2020PPP...54009543S